package com.imooc.cloud.mall.practice.common.exception;


import com.imooc.cloud.mall.practice.common.common.ApiRestResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.validation.BindingResult;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.ArrayList;
import java.util.List;

/**
 * ClassName: GlobalExceptionHandler
 * Package: com.imooc.mall.exception
 *
 * @Author 马学兴
 * @Create 2023/6/1 14:30
 * @Version 1.0
 * Description:处理统一异常的handler
 *
 */
@ControllerAdvice
public class GlobalExceptionHandler {
    private final Logger log= LoggerFactory.getLogger(GlobalExceptionHandler.class);

    @ExceptionHandler(Exception.class)
    @ResponseBody
    public Object handlerException(Exception e){
        log.error("Default Exception:",e);
        return ApiRestResponse.error(ImoocMallExceptionEnum.SYSTEM_ERROR);//系统异常
    }

    @ExceptionHandler(ImoocMallException.class)
    @ResponseBody
    public Object handlerImoocMallException(ImoocMallException e){
        log.error("ImoocMallException:",e);
        return ApiRestResponse.error(e.getCode(),e.getMessage());//业务异常
    }

    @ExceptionHandler(MethodArgumentNotValidException.class)
    @ResponseBody
    public ApiRestResponse handleMethodArgumentNotValidException(MethodArgumentNotValidException e){
        log.error("MethodArgumentNotValidException:",e);
        return handleBindingResult(e.getBindingResult());
    }

    private ApiRestResponse handleBindingResult(BindingResult result){
        //把异常处理为对外暴露的提示
        List<String> list=new ArrayList<>();
        if (result.hasErrors()) {
            List<ObjectError> allErrors = result.getAllErrors();
            for (ObjectError objectError : allErrors) {
                String message = objectError.getDefaultMessage();
                list.add(message);
            }
        }
        if (list.size()==0){
            return ApiRestResponse.error(ImoocMallExceptionEnum.REQUEST_PARAM_ERROR);
        }
        return ApiRestResponse.error(ImoocMallExceptionEnum.REQUEST_PARAM_ERROR.getCode(),list.toString());


    }

}
